# US 2014/0152089 A1 · Fuel cell system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152089 A1 - Document ID: US20140152089A1 - Status: Published application - Kind: A1 - Application number: 14/130,805 - Filed: 2011-07-05 - Published: 2014-06-05 - Earliest claimed: 2011-07-05 - Assignees: Toyota Jidosha Kabushiki Kaisha - Inventors: Kota Manabe; Hikaru Arai; Tomohiko Kaneko; Hiroyuki Imanishi - Web page: https://patentgrep.com/patent/US20140152089A1 ## CPC - G05F 1/46: wherein the variable actually regulated by the final control device is DC (G05F1/625 takes precedence) - B60L 1/003: {to auxiliary motors, e.g. for pumps, compressors} - B60L 7/14: for vehicles propelled by AC motors - B60L 50/51: characterised by AC-motors - B60L 58/40: for controlling a combination of batteries and fuel cells - H02M 3/1584: {with a plurality of power processing stages connected in parallel} - B60L 2210/46: with more than three phases - B60L 2240/525: Temperature of converter or components thereof - B60L 2260/44: by parameter estimation - B60L 2270/142: acoustic - B60L 2270/145: Structure borne vibrations - H02M 1/0048: {Circuits or arrangements for reducing losses (using snubbers H02M1/34)} - H02M 3/1586: {switched with a phase shift, i.e. interleaved} - Y02E 60/50: Fuel cells - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/72: Electric energy management in electromobility - Y02T 10/92: Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles - Y02T 90/40: Application of hydrogen technology to transportation, e.g. using fuel cells - G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract In a fuel cell system which includes a high-electricity multiple-phase converter, noise generated due to an increase in reactor vibrations and due to a sound pressure increase caused by a plurality of reactors is effectively inhibited, and silence is improved. A fuel cell system includes a multiple-phase converter provided between a fuel cell and a load device. The fuel cell system includes: selecting means (e.g., a controller) for selecting a driving phase of the multiple-phase converter in accordance with the load of the load device; and driving means (e.g., a controller) for driving a plurality of driving phases, when selected by the selecting means, at carrier frequencies so that these driving phases are nearly opposite to each other. ## Claims ### Claim 1 A fuel cell system which comprises a multiple-phase converter provided between a fuel cell and a load device, the fuel cell system comprising: selecting means for selecting a driving phase of the multiple-phase converter in accordance with a load of the load device; and driving means for driving, when the selecting means selects a plurality of driving phases, the plurality of driving phases at carrier frequencies so that the driving phases are nearly opposite to each other. ### Claim 2 (depends on 1) The fuel cell system according to claim 1, wherein, when the selecting means selects four driving phases, the driving means drives the four driving phases with a phase difference of 90°. ### Claim 3 (depends on 1) The fuel cell system according to claim 1, wherein, when the selecting means selects two driving phases, the driving means drives the two driving phases with a phase difference of 180°. ### Claim 4 (depends on 1) The fuel cell system according to claim 1, wherein, when the selecting means selects three driving phases, the driving means drives the three driving phases with a phase difference of 90°. ### Claim 5 (depends on 1) The fuel cell system according to claim 1, wherein the driving means switches the carrier frequencies of the driving phases within a predetermined band. ### Claim 6 (depends on 5) The fuel cell system according to claim 5, wherein the driving means randomly selects a plurality of carrier frequencies within a predetermined band around a reference carrier frequency of the driving phases, and switches to the selected carrier frequencies. ### Claim 7 (depends on 6) The fuel cell system according to claim 6, wherein the driving means uses a normal distribution as a distribution of the selected carrier frequencies. ### Claim 8 (depends on 5) The fuel cell system according to claim 5, further comprising: gain correction means for correcting a feedback gain in response to the switching of the carrier frequencies by the driving means when the multiple-phase converter is feedback-controlled synchronously with the carrier frequency. ### Claim 9 (depends on 8) The fuel cell system according to claim 8, wherein: the feedback control is PI feedback control having a proportional gain and an integral gain; and the gain correction means corrects the integral gain in accordance with the reference carrier frequency and the carrier frequency after switched. ### Claim 10 (depends on 5) The fuel cell system according to claim 5, further comprising: sin wave superposing correcting means for correcting, when sampling is performed by superposing a sin wave signal on an input current and an input voltage to measure the impedance of an input electric supply to the multiple-phase converter, sampled current and voltage values by superposing the sin wave signal corresponding to the carrier frequency after switched by the driving means. ### Claim 11 (depends on 5) The fuel cell system according to claim 5, further comprising: current sampling correcting means for correcting, when a reactor current of the multiple-phase converter is sampled, the timing of sampling in response to the switching of the carrier frequencies by the driving means. ### Claim 12 (depends on 5) The fuel cell system according to claim 5, further comprising: temperature correcting means for correcting, when the carrier frequency is used to estimate an element temperature of the multiple-phase converter, the element temperature estimated in response to the switching of the carrier frequencies by the driving means.